wechat msg preview in reading office docs

1.listen AsyncOnAddMsg event

%hook CMessageMgr
- (void)AsyncOnAddMsg:(NSString *)msg MsgWrap:(CMessageWrap *)wrap {
    WXSettingsInstance.username = msg;
    WXSettingsInstance.content = [wrap m_nsContent];
  [[NSNotificationCenter defaultCenter] postNotificationName:@"CBWeChatNewMessageNotification" object:nil];
}
%end

2.add new msg button in office docs' webView

%hook MMWebViewController
-(void)viewDidLoad {
    %orig;
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(cb_didReceiveNewMessage) name:@"CBWeChatNewMessageNotification" object:nil];
}

%new
- (void)cb_didReceiveNewMessage {
    NSString *username = WXSettingsInstance.username;
    NSString *content = WXSettingsInstance.content;
        NSLog(@"%@",username);
        NSLog(@"%@",content);

    CContactMgr *contactMgr = [[objc_getClass("MMServiceCenter") defaultCenter] getService:[objc_getClass("CContactMgr") class]];
    CContact *contact = [contactMgr getContactByName:username];
    dispatch_async(dispatch_get_main_queue(), ^{
        NSString *text = [NSString stringWithFormat:@"  %@: %@  ", contact.m_nsNickName, content];
                NSLog(@"%@",text);
                UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(0, 64, 414, 30);
                button.alpha = 0.7;
        button.backgroundColor = [UIColor blackColor];
        [button setTitle:text forState:UIControlStateNormal];
        [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        button.titleLabel.font = [UIFont systemFontOfSize:12];
                [button addTarget:self action:@selector(backToMsgContentViewController:) forControlEvents:UIControlEventTouchUpInside];
                [[self view] addSubview:button];
    });
}

%new
- (void)backToMsgContentViewController:(UIButton *)button {
    [button removeFromSuperview];
    // back to webview
    NSArray *webViewViewControllers = [[objc_getClass("CAppViewControllerManager") getCurrentNavigationController] viewControllers];
    WXSettingsInstance.webViewViewControllers = webViewViewControllers;

    // back rootViewController
    UINavigationController *navVC = [objc_getClass("CAppViewControllerManager") getCurrentNavigationController];
    [navVC popToRootViewControllerAnimated:NO];

    NSString *username = WXSettingsInstance.username;
    CContactMgr *contactMgr = [[objc_getClass("MMServiceCenter") defaultCenter] getService:[objc_getClass("CContactMgr") class]];
    CContact *contact = [contactMgr getContactByName:username];
    MMMsgLogicManager *logicMgr = [[objc_getClass("MMServiceCenter") defaultCenter] getService:[objc_getClass("MMMsgLogicManager") class]];
    [logicMgr PushOtherBaseMsgControllerByContact:contact navigationController:navVC animated:YES];
}
%end

3.add back button in chatview

%hook BaseMsgContentViewController
-(void)viewDidLoad {
    %orig;
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(414-50, 74, 40, 30);
    button.alpha = 0.7;
    button.layer.masksToBounds = YES;
  button.layer.cornerRadius = 15;
    button.backgroundColor = [UIColor blackColor];
    [button setTitle:@"back" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    button.titleLabel.font = [UIFont systemFontOfSize:12];
  [button addTarget:self action:@selector(backToWebViewController) forControlEvents:UIControlEventTouchUpInside];
  [[self view] addSubview:button];
}

%new
- (void)backToWebViewController {
    NSArray *webViewViewControllers = WXSettingsInstance.webViewViewControllers;
    if (webViewViewControllers) {
        [[objc_getClass("CAppViewControllerManager") getCurrentNavigationController] setViewControllers:webViewViewControllers animated:YES];
    }
}
%end